Steve Benen is creeped out by Romney's stump routine:
[A]s Seth Masket noted, “keep America American” sounds an awful lot like a line we might expect from Bill the Butcher. (It also, of course, reinforces the not-so-subtle attack on President Obama’s patriotism, which has long been a favorite ploy for Romney.)
And a classically McCarthyite one, from an alleged moderate. Apparently Romney's campaign shares the slogan with the KKK.